Jump to content


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Mild barlow for use with Leica 20-60x zoom?

  • Please log in to reply
9 replies to this topic

#1 Aquarist

Aquarist

    Apollo

  • -----
  • Posts: 1041
  • Joined: 27 Aug 2012
  • Loc: Illinois

Posted 26 January 2013 - 08:55 AM

Any recommendations for a mild barlow with the Leica 20-60x zoom? Thanks for any ideas/recommendations.

#2 johnnyha

johnnyha

    Fly Me to the Moon

  • *****
  • Posts: 6547
  • Joined: 12 Nov 2006
  • Loc: Sherman Oaks, CA

Posted 26 January 2013 - 03:25 PM

You can screw the lens element of a Barcon onto the adapter, I dunno about the 20-60X zoom but in the ASPH this yields around 1.5X I believe. Only potential problem is the threads might not match exactly - mine don't.

A GSO barlow element would be a less expensive solution, I imagine it yields similar magnification.

#3 Doug Culbertson

Doug Culbertson

    Aurora

  • *****
  • Posts: 4685
  • Joined: 06 Jan 2005

Posted 26 January 2013 - 03:38 PM

I use the Antares 1.6x barlow, which actually yields around 1.54x or so. I find it to be an excellent barlow, and you can add a 2" extension to get 2x.

#4 Aquarist

Aquarist

    Apollo

  • -----
  • Posts: 1041
  • Joined: 27 Aug 2012
  • Loc: Illinois

Posted 26 January 2013 - 03:56 PM

You can screw the lens element of a Barcon onto the adapter, I dunno about the 20-60X zoom but in the ASPH this yields around 1.5X I believe. Only potential problem is the threads might not match exactly - mine don't.

A GSO barlow element would be a less expensive solution, I imagine it yields similar magnification.


Actually I have the ASPH. I thought the Astro-Physics Barcon was discontinued and replaced with their 2" Advanced Convertible Barlow. Is that likely to be threaded for the ASPH? 1.5x is really what I would like.

#5 johnnyha

johnnyha

    Fly Me to the Moon

  • *****
  • Posts: 6547
  • Joined: 12 Nov 2006
  • Loc: Sherman Oaks, CA

Posted 26 January 2013 - 05:05 PM

The ASPH is not 20-60X, it's 25-50X.

I have an older Barcon which has 48mm threads but they do not match the pitch of the 48mm threads on my Leica Adapter, I can only screw it in a couple turns. I imagine the new Advanced Barcon would be the same. This is the fault of the APM Leica adapter not the Barcon.

I also have an Antares 1.6X barlow as Doug mentioned and it works really well with the Leica ASPH zoom.

#6 Aquarist

Aquarist

    Apollo

  • -----
  • Posts: 1041
  • Joined: 27 Aug 2012
  • Loc: Illinois

Posted 26 January 2013 - 05:45 PM

Yes, you are correct, my cutting and pasting was poorly done. I guess I will go with the Antares since that is about what I was looking to obtain.

#7 johnnyha

johnnyha

    Fly Me to the Moon

  • *****
  • Posts: 6547
  • Joined: 12 Nov 2006
  • Loc: Sherman Oaks, CA

Posted 26 January 2013 - 05:54 PM

Good choice. I have found the Antares 1.6X barlow to be an extremely versatile 2" barlow - low profile, inexpensive, and excellent quality - it seems to work well with everything. :cool:

#8 andydj5xp

andydj5xp

    Apollo

  • -----
  • Posts: 1433
  • Joined: 27 May 2004
  • Loc: 52.269 N/10.571 E

Posted 27 January 2013 - 02:55 AM

Yes, you are correct, my cutting and pasting was poorly done. I guess I will go with the Antares since that is about what I was looking to obtain.


Despite the title of this thread Leica ASPH in a slow Newt the discussion mainly deals with different configurations for barlowing the Leica ASPH. In case you haven't seen it have a close look.

Andreas

#9 Aquarist

Aquarist

    Apollo

  • -----
  • Posts: 1041
  • Joined: 27 Aug 2012
  • Loc: Illinois

Posted 27 January 2013 - 09:05 AM

I have not seen it but will check it out. Thanks!

#10 Aquarist

Aquarist

    Apollo

  • -----
  • Posts: 1041
  • Joined: 27 Aug 2012
  • Loc: Illinois

Posted 27 January 2013 - 09:53 AM

Excellent information. Thanks Andreas!!!


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.



Recent Reviews


Imaging/Sketching Contest






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics